tachometer

ta-chom-e-ter · noun

imported

Definitions

noun

  1. 1.

    An instrument that measures the rotational speed of a shaft or disk, especially in a vehicle engine, typically displayed in revolutions per minute (RPM).

Forms

plural: tachometers

Related words

See also: gauge, odometer, speedometer
Synonyms: rev counter, tach

Etymology

From Greek tachos meaning "speed" + metron meaning "measure."